/DEF:filename
This option passes a module-definition file (.def) to the linker. Only one .def file can be specified to LINK. For details about .def files, see Module-Definition Files.
Do not specify this option within the development environment; this option is used only on the command line. To specify a .def file, add it to the project along with other files.
Setting Linker Options | Linker Options | FAQ: Building Your Program